Preparation of cyclic urea compounds

Details Preparation of cyclic urea compounds Preparation of cyclic urea compounds

1994-04-20

1996-04-16

Bond, Robert T.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

540492, C07D24304, A61K 3155

Patent

active

055084001

ABSTRACT:
This invention relates to the preparation of cyclic urea compounds. More specifically, this invention is directed to methods for selectively alkylating diamines, methods for selectively converting a mixture of alkylated and non-alkylated diamines to cyclic urea compounds, methods to purify cyclic urea compounds having a single N-substitution, methods to convert a cyclic urea compound having a single N-substitution to a cyclic urea compound having either symmetrical or non-symmetrical N,N'-disubstitution, and methods to remove protecting groups from cyclic urea compounds.

REFERENCES:
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Orszanska and Rulko, Polish J. Chem. (1982) 56:1287-1296.
Chenera, et al., Bioorganic & Med. Chem. Lett. (1993) 3:2717-2722.
Kempf, et al. J. Med. Chem. (1990) 33(10):2687-2689.
Kempf, et al., J. Org. Chem. (1992) 57:5692-5700.
Newlander, et al., J. Med. Chem. (1993) 36:2321-2331.

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